What is sodium ascorbyl phosphate?

Sodium ascorbyl phosphate is a stable, water-soluble form of vitamin C used in skincare for antioxidant properties.

Published safety reviews show no identified concerns with sodium ascorbyl phosphate at typical use levels.

It's a derivative of vitamin C that's more stable in formulas than pure ascorbic acid, though it requires conversion in skin to exert full antioxidant effects.

antioxidant · active

Sodium Ascorbyl Phosphate

Generally safe·Moderate evidence

This is a stable, water-soluble derivative of vitamin C that converts to ascorbic acid in skin and is used for antioxidant and brightening support. It is generally better tolerated than plain ascorbic acid and has a low reported rate of irritation in formulation testing.

Questions

What is sodium ascorbyl phosphate?: Sodium ascorbyl phosphate is a stable, water-soluble form of vitamin C used in skincare for antioxidant properties.
Is it safe?: Published safety reviews show no identified concerns with sodium ascorbyl phosphate at typical use levels.
Is it vitamin C?: It's a derivative of vitamin C that's more stable in formulas than pure ascorbic acid, though it requires conversion in skin to exert full antioxidant effects.

Products with Sodium Ascorbyl Phosphate

In our guides

Ingredients
Vitamin C serums: forms, stability, and what actually matters

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.